This 6-position gas valve kit allows for a wider range of gas adjustments of the MDR for reliable function with a wider selection of ammunition and suppressors currently on the market. Kit includes valve, coiled spring pin, gas knob detent spring, and gas knob detent. Valve will come with piston ring installed.

This kits gives shooters more options for a variety of suppressor and ammunition. Compared to the 3-position kit, it also features an enhanced gas valve Detent and Spring that increases positive engagement with an audible click. Users can adjust the gas valve via a new slot that is accessible with the handguard attached.